Boiler



(Ne Medel.) l f2 'sheets-sheet 1.

-J. J'. LONG.

BQILER.

No. 523,672. Petentea July 31,1894.

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JEREMIA-H J. LONGq'OFCHICAGO, ILLINOIS.

BDI LE R SPECIFICATIONforming' part of Letters iPatentNlo. 523,672,dated Julyv31', 1894.A

Application'iiled-Decembez-JZS'1893. SerlalrNo. 4941517. (Normodel.)

v To MZ-whomA #may concern/.-

I I Se ,it yknow'ntthat I, JEREMIAHy J. LONG, a citlzenfof the UnitedStates,'residinglat Cl1icago, HCook countyylllinois, have invented.

certainnew and useful Im-provements in Boilers, of which thefollowing-is aspecication.

The object of my inventionis to provide a simple and efficient boiler ofthe type commonly known as the water tube boiler, and capable of useeither'for vhot-water systems or for the generation of steam.

My. boiler is designed to securethe advantages of a rapid heating boilerhaving a per-Y fectcirculation, and avoiding the injuriousv effects ofheat, as experienced in other forms of boiler, upon the rolled ends ofthe water tubes. f

By the use of my invention, I am enabled to constructa boiler bothdurable and economical in construction and operation; and

my Ainventionconsists in the features and de` tails of constructionhereinafter described and d claimed. y

In the drawings, Figure l is a vertical/section of my improved boiler;Fig. 2 a cross sectional viewof my boiler, online 2 2 of Fig.

l; Fig. 3 an elevation of two water tubes enlarged to showy thepartitions therebetween; and Fig. 4a sectional' view, taken on line 4 ofFig. 3.

In constructing my improved boiler, I make preferably a cylindricalouter shell or casing, A, of,A suitable material-preferably boileriron-and resting upon any suitable base or support, B. Within the baseare arranged the usual grate bars, b, with an ordinary fire pot, A',located above them. The upper llue head, C, is made preferably of ironand adapted to cover the open end of the outer shell, and into it arerolled the upper ends of a series of vertical water tubes, c c c2, ofsuitable number and dimensions. Upon the head is secured a curvedsupplemental head, E, whereby a steam dome or chamber is formed abovethe ue head and at the top of the boiler.v The lower ends of the tubesare in like manner rolled into another fluehead, D, to which is secureda similar supplemental head or plate, d, forming a water chamber at thebottom of the boiler and below the lower ends of the water tubessituated adjacent to the fire chamber and This chamber is' communicateswith the tubes. The *rolled* ends ofthe tubes'are not,l therefore;exposed to the intense heat of thefire," beingfasur-v rounded withwater, and-they are consequently rendered more Adurable in use.'Surrounding the tubes I preferably arrange an inner shell-or casing, e,having openings 'atl its sidesfanfd near the top thereof, to ,accom-vmodate suitable smoke iiues, F F, which pass through the outer shell, asindicated-"in',tllij"y drawings.` Preferably throughthe centerbf thewater chamber, an opening or liue,' Gr, is provided,allowingzcommunication from, the fire chamber to the water tubes andtotheiniv terior of the shell. s

y For the purpose of supplying .fue'lto the magazine', hoppers, a, arelocated at suitable points around the outershell and communicate with'the interior.` These hoppers are normally closed by doors, axasindicated'in the drawings, where the lire chamber and magazine are shownlfilled with fuel.v U n A water-'inlet pipe, H, enters the bottom of thewater chamber,'and an outlet pipe,`C', is provided at theftop of theupper heador dome, or at any other i suitable pointv as lder:l sired.This outlet pipe is for the passage of steamer hot water as 'thecase'maybe, ldepending upon whether the boiler "is used "as a` 'hot waterboiler or asa steam generator.

The water tubesmay be of any desired nu'ml" ber, and are arranged insets'orserie's,`pref erably along the circumference of circles down fromthe center of the boiler, that is to say, substantially, though notnecessarily,

equi-distant from the center, although I do not wish to be yunderstoodas unduly limiting myself to such exact location and arrangement oftubes, as some of the tubes of the same series may be arranged nearer tothe center than others. v Between the tubes of each series are securedpartitions, I, K, which are a suitable length shorter than the tubes.These partitions consist of straight metallic strips, having their edgespreferably turned at an angle to conform to the shape ,of the tube. Inorder to secure these partitions to the tubes, I provide suitableclamps, j, arranged preferably near the top and bottom, respectively,and consisting of a short strip, of construction similar to thepartitions and clamped thereto by bolts, as shown in detail IOO in Fig.4 of the drawings. Any other construction of partition and other meansof clamping to the tubes may be adopted and still be within the scope ofmy invention.'

In the drawings I have shown a preferred form of construction of boilerin which the iirst series of tubes is unprovided with partitions, butthe adjacent set or series is provided with partitions, J. Thesepartitions extend to within a short distance from the top of the tubechamber or head, C, leaving a space or passage, while the partitions, K,on the next adjacent series of tubes extend from the top to within ashort distance `from the bottom thereof, leaving a similar space orpassage therebelow. In this manner, there is formed a series ofconcentric chambers communicating with each other, in such manner thattheflames, heated gases, dac., must traverse their entire length beforeescaping from the smoke lines, F, F. The flames, gases, dac., from thetire chamber pass through the opening, G, striking the first series oftubes in their upward passage, and then pass over the top of thepartitions, J, near the top of the boiler, and are then deflecteddownward between the second and the third series of tubes and returnedto the base of the boiler, passing under the partitions, K, entering thenext and last chamber, and finding exit through the ues, F, afterpassing up alongside of the last series of tubes.

Any number of series of water tubes may be used, `and thereby acorresponding number of chambers made between the series of tubes. i

The advantages secured by my style of boiler will be readily apparent tothose skilled in the art of boiler making. One of the greatestdifficulties experienced in the use of boil ers is the burning out ofthe tubes where they i are rolled into the head, and where the heatwhich acts directly upon them in all other forms is most intense. In myboiler, the ends of the tubes being surrounded by a water chamber areprotected, imparting longer life to the tubes and insuring greaterdurability to the boiler. Furthermore, with the use of the partitions, Iam enabled to secure a larger heating surface, and to utilize the iames,heated gases, dac., to their fullest extent without interfering with thedraft. In every respect I claim that my boiler is thoroughly efficient,and simple in construction and operation, most economical in the matterof consumption of fuel, by reason of the partitions between the tubes,and more durable than any other type by reason of the protectionafforded to the tubes.

Although I have shown my boiler in the drawings as intended to be usedfor the generation of steam, it will be understood that it can beadvantageously used in connection with hot water systems by simplyfilling up the boiler and circuit pipes with water, and I contemplate scusing it. Nor do I wish to be understood as limiting myself to theprecise location and arrangement of the partitions shown in thedrawings; and although I have shown more or 'less precise forms anddetails of construction, I do not intendto undulylimit myself thereto,except as expressly specified in the claim, as I desire to deviatetherefrom, and contemplate changes in form, proportion of parts and thesubstitution of equivalents, as circumstances may suggest or renderexpedient, without departing from the spirit of my invention.

What I regard as new, and desire to secure by Letters Patent, is

In a boiler the combination of a shell, upper and lower drums arrangedwithin the shell, a series of water tubes communicating with the drums,concentric cylindrical partitions arranged among the tubes, saidpartitions being provided with yopenings alternately at the top andbottom and a combustion chamber arranged beneath the lower drum,substantially as described.

JEREMIAH J. LONG.

Witnesses:

GEORGE I-IIBBEN, SAMUEL E. HIBBEN.

